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But as darkness brings lower temperatures, police have strong concerns about the ongoing situation.

Supt Hawley added: "For the last 48 hours all communication has been not to drive on the road network unless urgent.

"Resources are working to address where vehicles are now stuck as a result of the adverse weather we and many other agencies have been warning the public about."

Devon's roads have come to a standstill and emergency services are working at their peak to try and move drivers to safety before darkness falls on Thursday.

Major roads which are closed or blocked include the M5 southbound, A30 in both directions at Okehampton, A38 eastbound, the A380 and Telegraph Hill, A399 Blackmoor Gate, A381 at Ipplepen and A3079 Tanners Hill.